长支链聚丙烯及其碳纳米管复合材料的电性能和流变性能研究  

Electrical Property and Rheological Behaviors of LCBPP/MWNTs Composites

作　　者：付顺成 陈怡安[1] 李晓光[1] 杨其[1] 

机构地区：[1]四川大学高分子科学与工程学院四川大学高分子材料工程国家重点实验室,四川成都610065

出　　处：《塑料工业》2016年第9期128-132,140,共6页China Plastics Industry

摘　　要：采用自由基熔融接枝的方法制得长支链聚丙烯(LCBPP),通过熔融共混得到聚丙烯(PP)/碳纳米管(MWNT)和LCBPP/MWNT导电复合材料。红外光谱表明,三羟甲基丙烷三丙烯酸酯(TMPTA)分子成功接枝到了PP分子主链上。对复合材料进行导电性能测试发现由于长支链造成的高黏度使得碳纳米管在LCBPP中的分散性差,因此逾渗值大于PP/MWNT复合材料的逾渗值,导电性较差。流变性能测试发现MWNT含量低于2%时,会首先破坏LCBPP的分子链缠结,之后随着含量增加,逐渐形成导电网络结构。A kind of long chain branched polypropylene （LCBPP） was prepared by radical melt grafting method. Then the PP/muhi-walled carbon nanotubes （MWNTs） composites and LCBPP/MWNTs conductive composites were produced by means of melt blending. The infrared （IR） spectra results indicate that TMPTA is successfully grafted onto the macromolecular skeleton of PP. Electric performance tests reveale that the electrical percolation threshold of LCBPP/MWNTs composites is high than that of PP/MWNTs composites due to the poor dispersion of MWNTs in LCBPP. Rheological analysis results show that MWNTs would destruct chain entanglement of LCBPP with the content of MWNTs less than 2wt%. While with the NWNTs content increases, conductive network is formed gradually in the composites.

关 键 词：长支链聚丙烯 碳纳米管 导电 逾渗 流变 

分 类 号：TQ325.14[化学工程—合成树脂塑料工业]